ME. E. J. MIEBS ON THE IDOTEID^. 71 



This species, according to Harger, is of depressed-ovate form, 

 and is marked by a depressed line on each side running from the 

 posterior part of the head across the thoracic segments, nearer to 

 their lateral margins than the median line (except perhaps on the 

 last segment), thence to inclose a prominent hemispherical protu- 

 berance on the anterior part of the postabdomen ; the body aj)pears 

 slightly roughened under a lens, or sometimes minutelj^ hirsute. 

 Head slightly dilated on the sides, with the antero -lateral angles 

 produced, and with a pair of broad, low, triangular tubercles on 

 its anterior part and a curved posterior depression. Thoracic 

 segments with thick evident margins ; first smallest, somewhat 

 embracing the head, third and fourth largest, the last segment 

 curving round the base of the postabdomen ; all, according to 

 the figure, have their antero- and postero-lateral angles rounded. 

 Postabdomen shorter and broader than in E. montosa, with a 

 rounded lobe near its base separated from the large posterior 

 portion by a more or less evident incision ; it is dorsally convex ; 

 lateral margins nearly even, and the distal is separated from the 

 proximal portion by a broad and deep groove, which is continued 

 to the margin, with only, at the most, traces of a tubercle on 

 each side, the distal convexity being continued upon the obtusely- 

 pointed apex. Eyes lateral and prominent. Antennules are 

 longer than the head, and surpass the antennae, with the basal 

 joint but little enlarged. Antennge shorter than the head, not 

 surpassing the third antennulary joint ; the joints increasing in 

 length to the fourth, fifth as long as the fourth, but more slender; 

 bearing the minute slender rudiment of a flagellum, which is 

 setose at the tip. Legs slender, more or less hairy, with the 

 slender reflexible dactylus almost acicularin some of the posterior 

 pairs. Colour uniform, dull. Length about | inch (6 millim.), 

 breadth rather over J^ inch (2'3 millim.). 



This species ranges, according to Harger, along the eastern 

 coast of the United States from Egg Harbour, New Jersey, to 

 Quahog Bay, Maine. 



There is in the Museum collection but a single small example 

 of this species, preserved dry, from Egg Harbour, New Jersey 

 (T. Say). A second specimen that formerly existed in the collec- 

 tion is now destroyed. I have therefore taken the description 

 from Harger's Report. 



The stylet on the second pair of postabdominal appendages in 

 the male is a little less elongated than in the next species. 



